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nix-channel: Use binary caches advertised by channels

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Channels can now advertise a binary cache by creating a file
<channel-url>/binary-cache-url.  The channel unpacker puts these in
its "binary-caches" subdirectory.  Thus, the URLS of the binary caches
for the channels added by root appear in
/nix/var/nix/profiles/per-user/eelco/channels/binary-caches/*.  The
binary cache substituter reads these and adds them to the list of
binary caches.
This commit is contained in:
Eelco Dolstra 2012-08-01 17:56:11 -04:00
parent 79bba3782c
commit 5170c5691a
4 changed files with 49 additions and 20 deletions
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12
doc/manual/conf-file.xml
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@ -329,6 +329,18 @@ build-use-chroot = /dev /proc /bin</programlisting>
</varlistentry>
<varlistentry><term><literal>binary-caches-files</literal></term>
<listitem><para>A list of names of files that will be read to
obtain additional binary cache URLs. The default is
<literal>/nix/var/nix/profiles/per-user/root/channels/binary-caches/*</literal>,
which ensures that Nix will use the binary caches corresponding to
the channels installed by root. Do not set this option to read
files created by untrusted users!</para></listitem>
</varlistentry>
<varlistentry><term><literal>trusted-binary-caches</literal></term>
<listitem><para>A list of URLs of binary caches, separated by